Control apparatus



1927. May L. 5. RILEY ET AL CONTROL APPARATUS Filed Ma 17, 1920 5 Sheets-Sheet; l

m m H R nk Orbw N wmm R NHM o WIWH. A ammm @MJ W B L WITNESSES MM.

May 3 1927.

cs. RiLEY ET AL CONTROL APPARATUS Filed May 17. 1920 5 Sheets-Sheet; 2

5 .uwm J m. M m w w 7 3 .r r I 6 ,/1/1/ 4 2 g. 21 6 3 I I /H INVENTORS Lynn 6 Riley, Harry R Meyer,

Howard H. Johnston and Jan I7. van Nieukeriren. BY

ATTORNEY May a Q 1621340 L. G. RILEY ET AL CONTROL APPARATUS Filed May 17, 1920 s Sfieet-Shet 3 A A; l A 4 4' A'IIIIIZIIIIII "7 Jim M. van Nieuhnrken MW BY 90 'ATTTORNEY 5 Sheets-Sheet 4 For screws 53@ INVENTORS L. G. RILEY ET AL CONTROL APPARATUS Filed May 17, 1920 May 3 1927.

fbr screws 34 97\O1 {1" lr" I 1 ti C aa'fi o Lynn G. Riley. Harry H. Meyer,

Howard H. Johnsion and Jan "van Nieukerh'en. BY

ATTORNEY WITNESSES May 3, 1927.

L. G. RILEY ET AL CONTROL APPARATUS Filed May 17. 1920 5 Sheets-Sheet 5 o E o ENTGFZS q. Harry A. [79:18! Howard H Johnsfon and ATTORNEY Jan Mvan Nieukerhen. BY

@m n I mm m Wm m m m m @E g m m m m W 1 X Patented May 3, 1927.

UNI TED ST AT E S PAT EN T OFFICE LYNN G. RILEY AND HARRY R. MEYER, OF V ILKINSBURG, IIOWARD H. JOHNSTON, OF

EDGEWOOD PARK, AND JAN M. VAN NIEUKERKEN, OF XVILKINSBURG, PENNSYL- VANIA, ASSIGNORS TO WESTINGHOUSE ELECTRIC 4% MANUFACTURING COMPANY,

A CORPORATION OF PENNSYLVANIA.

CONTROL APPARATUS.

Application filed May 17, 1920.

Our invention relates to control apparatus and it has special relation to attachments for platform controllers of the well-known K'type for electric railway vehicles.

One Object of our invention is to provide a structure of the above-indicatedcharacter which may be readily attached to K controllers of many existing types to ensure a proper sequence of operation of the controller with respect to a line switch, whereby all arcing and burning of the controller segments and lingers, during both forward and backward movement of the controller, may be avoided.

Another object of our invention is to provide an apparatus of the class under consideration which shall be readily accessible for inspection or repairs by reason of the fact that it is mounted on the top of the controller case.

A further object of our invention is to provide a switching attachment of the type set forth which comprises a self-contained unit of relatively small size and regular contour which may be installed. as a unit be tween the coiiltrollcr shaft and the usual operating handle.

More specifically stated, one object of our invention is to provide a switching attachment for K controllers embodying a pair of interlocking dogs that are respectively associated with the COIltI'Ol-(ll'tlllll shaft and the operating handle to permit a predetermined degree of relative or lost motion, thus ensuring that the line switch shall be so 01% erated as totake all the arcing and burning incident to the closure and opening of the motor circuits.

Viewed from another angle, it is an objectof our invention to provide the interlockingdog structure, as specified above, for carrying certain contact segments and, in. addition, a control finger that is located between the two dogs for effecting another circuit connection, as hereinafter more fully described.

A further object of our invention isto provide an automatic locking device, in conjunction with the two dog structures outlined above, for preventing the interlockii'ig dogs from accidentally separating and opening the line switch after closure thereof has been once effected.

Serial No. 381,980.

Another object of our invention is to pro-- vide an apparatus for readilv permitting inching o1 yoggmg of the motor without requiring any movement of the control drum proper.

These and other objects of our invention may best be understood by reference to the accompanying drawings, wherein Figure 1 and 2 are views, respectively in plan and in front elevation, of the complete.structure as assembledand installed upon a controller; I

F ig. 3 is a transverse sectional vie\v,-taken along the line IIIIII of Fig.4;

Fig. 4- is a longitudinal sectional view, taken along the line IV-IV of Fig. 3;

Fig. 5 is an elevational view of the interior parts of our switching attachment, the casing members being shown in section;

.Fig. 6 to Fig. 17, inclusive, and Figs. 19, 21, 22 and 23 are detail views, either in cle- 'vation or in section, of (liiferent portions of the structure shown in Fig. 5;

Fig. 18 and Fig. 20 are developed views of a portion of the dog structures previously mentioned;

Fig. 24: and .llig. 25 are developed views of the complete dog structures; and

Fig. 26 is adiagrannnatic view of a portion ofa motor-control system which serves formed integral with the encasing member 1. The illustrated structure furthercomprises a detachable metal side cover '7 which may be secured to the main encasing member 1. by a plurality of tap screws 8; and a. short shaft incn'iber 9, which extends through a position indicating member 10 of inverted bowl-shape, to which it is secured by a pin 1.1,and through a water cap or boss 10' that is integrally formed with the top cover 5 of the controller casing and encloses a suitable bushing 15. The top cover 5 is further provided with a stop member or curved lug ti that extends upwardly from the cover plate and is preferably integrail formed therewith for the purpose of limiting the travel of the usual operating handle in both directions, in accordance with a. well-known practice. In addition, an indicating dish or plate 12 is secured to the top covei o and is so marked as to co-operate with a pointer or too 13 of the positionindicating member 10 to indicate to the operator the position occupied by the control drum at all times.

The K controller may be of a familiar form. having the normal illustrated off position and a number of spaced operative positions. Consequently no further description is deemed nece y here.

Referring to the structure within the encasing member, as shown in 3, t and 5, a dog member or cv'lindrical casting 16, which is shown in detail in Figs. 6, 7 and 8, is attached to the shaft 9 to be actuated thereby at all times. The dog 16 may be pinned to the shaft 9 or may be simply provided with an aperture of the same general rectangular shape as the shaft 9, whereby, in either case, relative motion of the dog and the shaft are prevented. The lower end of the shaft- 9 is threaded to receive a not or tapped collar 17 which abuts against the dog 16 to position it and is itself maintained in position by means of a pin 18 that extends through the shaft 9.

A second or lower dog member or cylindrical casting, 19, shown in detail in Figs. 9 and 10, is fitted over the customary drum shaft 20 of the K controller, which extends through the controller cover 1 1 and the water cap or boss 22, in accordance with a common construction. A set-screw 21 serves to rigidly position the dog 19 on the shaft 20.

The upper dog 16, as shown in Fig. 6, for example, com rises a plurality of quadrature-related radhilly-extending arms or lugs Q6, 27, 28 and 29 and a pair of oppositely located interlocking tongues or curved blocks 30 and 31 for purposes to be set forth. In addition. a conical recess is provided in the underside of the dog 16 between. the radial lugs 27 and 528, as shown in longitudinal section in Fig. 8. This recess is employed for a locking purpose, as hereinafter described in detail.

Referring again to Fig. 4:, a ring or annular drum of insulating material, such, for example, as a molded composition formed of fibrous material and a binder, and separately shown in plan in F in. 17 and in development in Fig. 18, is fitted around the dog casting 16, being secured thereto by means of a plurality of screws 3% that extend into the several lugs 26 to 29, inclusive. For the purpose of covering the heads of the screws 04;, to prevent grounding of the control apparatus therethrough, a sealing compound 35 is disposed in the outer portion of the screw holes. thus producing an adequately insulated structure.

A contact strip or segment 36. shown in plan View in Fig. 12 and in derelo nneutx in Fig. 24:, is attached to the lower portion of the outer face of the insulating; rine 3 by means of a plurality of rivets or pins 3T which extends into holes 37 in the insulating ring, as indicated in Fig. 18.

Cooperating with the contact segment itt is a contact linger 38 that is provided with a sul iporting shank 39, the two members being suital'ily secured to a linger-board or in sulating block lll by means of a contact bolt 23, the block 40 l'ieing itself attached to an internal lug; let of the encasing member 1 by means of bolts 25.

The lower do; casting til comprises a pluralit of radially e2-;temling arms or lugs 41 to 1st. inclusive, as illustrated in Fig. 5), together with a pair of oppositely located depending interlocking tongues or curved blocks 4:5 and 16 which occupy different positions in the same general plane as the interlocking tongues 30 and 31 of the upper dog; 16, and are thus adapted to interlace with them.

The angular space between confronting tongues is preferably about 35 that is, the upper dog 16 has 85 of free travel before striking the lower dog 19 in the one or the other direction. It should be noted that the various structural figures illustrate our device as occupying the off position. corresponding to a forward movement of 35 by the upper dog 16.

In addition, a deep recess 17 is drilled in the upper side of the dog it). and a pin 418, having a. stem 49 of reduced diameter, tits within the recess 47 and extends its conical head a slight distance :hove the surface of the dog 19, being biased to that. position by means of a spiral spring: 50 that. coiled around the stem -15). A suitable nut 51, which is threaded on the lower end of the stem at?) and is located on the underside of the dog 19. serves to limit the upward movement of the locking pin 48. This pin adapted to co-operate with the notch or recess 32 in the upper dog 16, as subsequently described in detail.

An insulating ring or annular drum structure 52, similar in con'iposition to the insulatine; drum 33. is disposed around the (lop; custing 19, being secured thereto by means of a plurality of screws 53 that extend into the radial lugs 11 to 41, inclus ve, and which are again insulatedly sealed off by means of suit able insulatine material A contact strip or segment 50, shown in develo 'iment in Fig. 25. encloses the upper portion of the insulate in c, drum for the purpose of ciigaging an loo tact segment 36.

intermediate linger that is mounted upon the finger-board 4.0. The contactseginent is secured to the drum by means of a plu rality of pins or rivets 56 sthat extend into holes 56 in the insulatingdrum, as indicated in Fig. 20.

Fig. 5 shows a contact linger 57, which is illustrated .in detail in Figs. 15 and 16, one end of which is provided with asuitable con tact tip 58, and theother end of which is secured, by means of scre s60, to a'fianged washer 61,01- the like, that tits within the groove 62 (Fig. 18). as also shown in the de vcloped riew, 9.4:. al'n this way, the finger 57 is permanently connected to the con- The finger is arcuate in shape andythus is wholly included withiirthe houndaries ol the rotatable dogs.

The ends-of the contact strip or segment 36 (Figs. 11 and 24s) are separatedby an insulating strip 63 of similar width and thickness, which is secured to the iusulatingring' 33 by means 01 serewsv fi -l that extend :into openings 65 (Fig. 18).

Below the insulating stripGS, another in sulating niembertifi, which is arcuate in plan and channel-shaped in cross-section, (see also Figs. 21 and 23) is secured to the underside of the insulating ring 33 by means of screws which pass-throu h openings 67 and (58 in the insulating mem er, which openings respectively register with holes 69 and 70 (Fig. 18) in the insulating ring 33.

The contact segment 55 onthe lower insulating drum 52 has one end secured to a metal block 71, by means of a screw 72, as indicated in Fig. 25, the contact block 71 being shown in detail in Figs. 13 and 14;.

A short insulating strip .75 is secured below the metallic block '71 to the insulating;

ring 52 by means of a plurality of screws 745, that extend into holes. 77 (Fig. 20). A longer insulating strip of similar width and thickness tothe strip 75, is also secured to the insulating drum 52, being separated from the insulating strip 75 by a contact plate or segment 84. which attached to the insulating ring by meansot' a screw 85 that extends into a hole 86 (Fig. 20).

Above the metallic block 71. an insulat ing member 78 (see also Figs. am 23 0t arcuate shape in plan and channel-shaped in cross-section, secured to the upper side or the upper t'ace oi the insulating drum by means of screws that pass through openii 79 and 80 which respectively register w holes 81 and 852 in the insulating, ring Ft E20). A suitably configured opening 83 is provided in the floor of the insulating incinber 78 to permit the contact block 71 to extend therethrough and thus be in position to make contact with the tip 58 otthe control finger 57.

A third control finger 87 in the auxiliary switching attachment is adapted to engage the vcontact segment '84 under certain operating conditions, as zhereinai ter set forth in detail.

It =will-bc seen that we thus provide an auxiliary switching attachment comprising azpair of relatively rotatable and mechanically interlocking; unembers that are respectively adapted for manual operation and for attachment to the unain .control drum shaft, the rotatable members each carrying a .contact segment upon its curved face, while a contact device is disposed betweemthe rotatable members tor the purpose of effecting electrical connection between the end surfaces thereof.

The operation of our, invention and the electrical circuits established thereby will now be described. In Fig. :the system shown comprises the various contacting members of our auxiliary switching attaclr incnt and aportion or? those to v be found in the K controller or main-circuit switch.- ing device 1r. In addition, a supply-circuit conductor, marked Trolley, a line switch LS and a main motor-circuit or accelerating resistor OSare shown.

Under normal conditions, that is,. when the court) lei handle has been anoved to its extreme position corres ionding to the righthand vertical taco ot the stop member 6' (Fig. l), the electricalcircuits are 0rganized and arranged .as illustrated in Fig.9(l, wherein it will be seen that this normal position lies a certain distance beyond the line corresponding to the familiar oil position ot' drum controllers and, in this particular case, we prefer an angular distance oi approximately 235 between the normal and the oil position that corresponds to forward or advancing drum movement. this time, the control linger 38 cup" portion of the upper :contact seg o, while the control linger 55*Qrests upon a portion of the insulating ring Consequently, no circuit is completed, although 1 a live circuit extends tar as the tip of the control finger 57 between the rotatable auxiliary drunimembers.

Under these conditions, the interlocking tongues upon the confronting end faces of the rotatable dogs 18 and 19 are separated by the above-mentioned angular distance of 35 in the direction to be considered as forward, namely. clockwise when viewing the auxiliary control apparatus from the top, indicated. by the arrow in F, 3. This con d ition of the interlocking d gs is shown in Fig". 26.

Upon torward movement of the auxiliary shaft 9 by the usual control handle (not shown) for a distance of 35, the customary otl position ot the K controller is is reached. Such movementof the auxiliary shat't 9 has efiected rotation of the upper dog 16 aloranand, as soon as the tongues 31 and and the tongues 30 and 16 engage. as illustrated in the structural figures, the contact tip 58 of the control linger .37, which is located between the dogs, engages the contact block Tl. In this way, the energization of the auxiliary switching attaclnncnt extends as far as contact segments and Ell, and, in fact, through control linger 55 to conductor 91 and auxiliary contact linger 92 of the open line switch LS.

Consequently, at this time, the two dogs 16 and 19 are mechanically interlocked, as shown in the structural ligures, and continned movement in the forward direction of the auxiliary shaft 9 by the controller handle will effect simultaneous travel of the contact segments 56 and and of the main control drum 14*.

As soon as the off position is reached, a further mechanical action tHl-ZQS place in the nature of the insertion of the p n 18 thatis associated with the lower dog 19 into the notch 32 in the confronting end face of the upper dog 16. hile this lock is only temporary and may be removed atwill by backward actuation of the controller handle, it, nevertheless, serves a useful purpose in preventing the two dogs from becoming accidentally separated by reason of jars caused by the operation of the controller or by the travel of the vehicle. Thus, when once the upper dog 16 has been actuated to the of? position, corresponding to electrical connection of the upper and lower Contact segments 86 and 55, such connection is automatically maintained throughout the remainder of the forward operation of the control appartus.

Movement of the control apparatus through an angle of approximately 16 from the off position to the run position, which corresponds to the initial operative position of the K controller, first causes the contact segments 95 of the 1 controller to engage with control lingers 93 and 94. In this way, a circuit is established from one stationary contact terminal 96 of the line switch L5 through conductor 97, control fingers 5)? and 91. which are bridged by contact segment 95 of the K controller, and thence through accelerating resistor 98 and the vehicle inotor or motors to ground. Consequently, the initial circuit through the K controller is completed before the line switch is closed, whereby itis ensured that the arcing incident to completion of the main motor circuit will be taken by the line switch LS.

Such circuit completion is effected as soon as the control apparatus reaches the abovementioned run position, wherein the contact segment S t of the auxiliary switching attachment engages control linger 87. Under these conditions, a circuit is established from the trolley through auxiliary-circuit handswitch 9t), control linger 38, contact segment 36, control fin er 57, contact block 71, contact segments 05 and 8 1, and control tingcr 87 of the auxiliary switching device, whence circuit is continued through a suitable rcsistor 99 and the actuating coil of the line switch LS to ground.

consequent closure of the line switch completes a main. circuit from the trolley through conductor 100, main hand-switch 101 and the contact disk 10?, of the line switch to stationary contact terminal 96, whence circuit is conmleted through the K controller, as already traced.

As soon as the line switch LS is closed, a holding circuit therefor is formed from the contact segment 55 on the lower dog 19 through control finger 55, conductor 91, stationary contact terminal 92 and auxiliarybridging dish 10 1 of the line switch, whence circuit is continued through conductor 105 to the control finger 87. Consequently, the continued energization of the actuating coil of the line switch is ensured, even though the contact segment S-l becomes disengaged from the control finger 87 after the controller leaves its initial operative or run position.

However. although the closure of the line switch is thus maintained, the provision of a lifting circuit for the line switch in the first operative position only of the controller is desirable, since, whenever the line switch has been O3G116Cl, during motor operation, by a backwc d movement of the controller, as about to be described, the line switch LS should not again be closed until the controllcr has been returned to its initial op erative position run? In this way, it is ensured that the entire accelerating resistor 98 will be connected in circuit with the vehicle motor or motors before a connection to the supply circuit is effected.

Continued movement of the controller handle in the forward direction operates the entire apparatus as a unit, as previously mentioned, to effect any desired manipulation of the main control circuits, such as the successive short-circuit of sections of the accelerating resistor 98. Since this operation is well-known in the artand, furthermore, since he n1rticular type of system is not material to our present invention. we do not deem it necessary to further illustrate or describe the main circuits.

When it is desired to shut oil power, the controller handle is actuated in the reverse direction and finally strikes the right-hand vertical face of the stop member 6. The first actions accomplished by such backward movement of the controller handle are the enforced depression of the latching pin 48 and a reverse travel of the upper dog 16 for an angle of 35. The dog 16 is alone actuated until the opposite end faces of the interlocking lugs and 31 from thosein engage mcnt durin forward: drum movement come into contact with the confronting end faces to the lower ctaitact segment 55, as indicated in l igs. 223i, E35 and 26 by the legend Off position, re irning. Consequently, the initial backward movei'nent of the controller handle interrupts the circuit of the actuating coil for the line switch LS, which immediate ly opens and thus takes all the arcing that is caused by such interruption of the main motor circuit.

After the line switchhas thus been opened, the lower dog 19 and the K controller 14 may be backwardly rotated as a unit with the upper dog 16 until the extreme position mar-ti d Normal again reached, when all of the parts occupy the positions illustrated in Fig.

An important feature of our invention resides in the case and economy with which inching or jogging of the motor may be accomplished. In crowded thoroughfares, it is often necessary to continually apply power to, and cut oil power from the car motor or motors to produce the enforced low speed: in other words, the motor is inched along.

By the use of our switching device, this desirable process may be accomplished by moving only the controller handle and the upper dog 16, thus reducing wear of the main control drum and diminishing the necessary effort of the motorman. It will be observed that, upon a lmckward move ment of 35 of the upper dog 16 from the first or starting notch a of the main control drum 14-, the line switch is opened by reason of the separation of the intermediate finger 57 and the contact block 71; However, the control linger 87 remains in contact with the segment 84, since the Off position, returning is (et6-35):11 in advance of the Off position, advancing. See Fig. 24.)

Consequently, by again actuating the corn troller handle and the upper dog 16 in a tt'm'ward direction through anangle of 35, the intermediate finger 57 engages contact block 71, thereby effecting closure of the line switch LS tl'irough control finger 87 and segment 84;, as previously traced.

This oscillating movement of the controller may be repeated, as desired, to produce inching ofthe'motor. without changing the position of' the K controller 14.

It should be noted, however, that this result cannot be accomplished unless the K controller occupies its initialoperat'ive position, thus insuring that the full value of accelerating resistance is connected in circuit with the motor whenever theline switch is closed.

We do not wish to be restricted to the specific circuit connections, structural details or arrangement of parts herein set forth, as various modiii .tttiODS thereof may be effected within the spirit and scope of our invention. We desire, therefore, that only such limitations shall be imposed as are iiulicated in the appei'ided claims.

Vie claim as our invention:

1. The combination with a control drum shaft, of an auxiliary contactcarrying de vice attached to said shaft and'having a plurality of lugs of angular dimensions corresponding to a predetermined portion of the travel of the device, a second shaft adapted for manual operation, and a second contactcarryingdevice mounted on said shaft and having a projection permanently looatedbe tween the lirst-mimed projections to selectively engage them after a predetermined.

degree of travel in the one or the other direction.

2. The combination with a casing, a control drum located within said casing and having an operating shaft, of an auxiliary contact-carrying device attached to said shaft outside of said casing and having a plurality of upwarally-extending lugs, a second shaft ada gited for manual operation and alined with the drum shaft, and a second contact-carrying device mounted ousaid second shaft and having a depending lug adapted to engage the first-named lug during a certain range of travel. '7

Control apparatus comprising a plural-, ity of alined relatively and individually rotatable members having end surfaces extend ing transversely to the axis of rotation and a contact device adapted to effect connection between. the confronting en d'su rfaces of said men'lbers during relative rotatable i'novement thereof.

4. Control apparatus comprising a plurality of alined relatively and individually rotatable members having a curved face and endfaces and provided with contacting surfaces on their curved faces, one of said members also having a contacting surface on an end face an'da contact device securedto an other member for engaging said end contact surface during relative rotatable movement of said members.

5. Control apparatus comprising rotatable control member, a plurality of mechanically interlocking members. respectively adapted for manual operation and for at tachment to said control member, said interlocking members having a curved face and end faces and provided with contacting surfaces on their cmrvedfaces, and contact device for effecting connection: between certain end faces of said members.

6. Control apparatus comprising a plurality of rotatable members having parts caed for manual operation and for efiecting iii the arrangement of circuits, said members having curved faces and confronting end faces and said circuits including contact members on the curved faces of said rotatable members and also on the confronting end faces thereof.

7. The combination with a control drum shaft, of an auxiliary contact-carrying de vice attached to said shaft, a second shaft adapted for manual operation, av second contact-carrying device mounted on said second shaft and adapted to mechanically interlock with the first-named device, said device having confronting end surfaces, and a contacting device located bet-ween said contactcarrying devices for effect-ing connect-ion between the confronting end surfaces thereof.

8. The combination with a control drum shaft, of an auxiliary contact-carrying device attached to said shaft and having end faces and a projection, a second shaft adapted for manual operation, a second contactcarrying device mounted on said second shaft and having end faces and aprojection adapted to engage the first-named projection during a certain range of travel, and a contacting device for electrically connecting certain end faces of said contact-carrying devices, said contacting device being located and electrically connected wholly within the boundaries of the contact-carrying devices.

9. The combination with a control drum shaft, of an auxiliary contact-carrying device attached to said shaft and having ond faces and a plurality of lugs of angular dimensions corresponding to a predetermined portion of the travel of the device, a second shaft adapted for manual operation, a second contact-carrydng device mounted on said second shaft and having end faces and a projection located between. the first-named projections to selectively engage them after a predetermined degree of travel in the one or the other direction, and a contacting device located between said contact-carrying devices for effecting connection between the end faces thereof during such travel.

10. The combination with a control drum shaft, of an auxiliary contact-carrying device attached to said shaft and having end faces and a plurality of up\vardly-cxtendii\g lugs, a second shaft adapted for manual operation and alined with the drum shaft, a second contact-carrying device mounted on said second shaft and having end faces and a depending lug adapted to engage the firstnamed lug during a certain range of travel, and a contact linger secured to the end face of one device for electrically engaging the confronting end face of the other device during such range of travel.

11. The con'lbination with a control drum shaft, of an auxiliary contact-carrying device having end faces and attached to said shaft, a second shaft adapted for manual operation, a second contact-carrying device having end faces and mounted on said second shaft and adapted to mechanically interlock with the first-named device, and a contact finger located between said devices for effecting electrical connection between the end faces thereof only during the period of such interlockin 12. The combination with a main controller having a plurality of operative positions and a preliminary inoperative position, of an auxiliary switching attachment having a normal position, in advance of said inoperative position, wherein said attachment is mechanically disconnected from said controller, an initial contacting position corresponding to said inoperative position, wherein said attachment is interlocked with said controller, and an operative position effective after the initial operative position of said main controller.

13. The combination with a main controller having a plurality of operative positions and a preliminary off position, of an auxiliary switcl'iing attachment having a normal position, in advance of said off position, wherein said attachn'ient is mechanically disconnected from said controller, an initial contacting position, corresponding to said off position, wherein said attachment is interlocked with said controller, and a line-switch-closing position effective after the initial circuit connection in the first operative position of said main controller.

1%. The combination with a main controller having a plurality of operative positions and a prelin'iinary inoperative position, of an auxiliary switching attachment con'lprising one portion having a normal position, in advance of said inoperative position, wherein said attachment is mechanically disconnected from said controller, and comprising a second portion mechanically interlocking with the first-named portion in a position correspomling to said inoperative position, said second portion being further adapted to effect: closure of a certain circuit subsequent to the connection of the main controller in that circuit through its first operative position.

15. The combination with a main controller having a plurality of operative positions and a preliminary inoperative position, of an auxiliary switching attachment comprising one portion having a normal position, peripl'lcrally located in advance of said in operative position, wherein said attachment is mechanically disconnected from said controller, andv comprisinga second portion mechanically interlocking with the first-named portion in a position corresponding to said inoperative position, said second portion being further adapted to effect completion of a certain circuit subsequent to the connection. of the main controller in that circuit through its first operative position, and a contact device being located between said portions to COUllll'HlO a predeteri'nined circuit during such mechanical interlocking.

16. The con'il 'iii'iation with a main con troller having a plurality of operative posi. tions and a preliminary off position, of an auxiliary switching attachment comprising one rotatable portion having a normal posi tion, peripherally located in advance of said off position, wherein said attachment is mechanically disconnected from said controller, and comprising a. second rotatable portion mechanically ii'iterlocking with the tirst-nmned portion during a certain range of travel in a position corresponding to said ofli position, said second portion being further adapted to eilect completion of an aijixiliary line switell-closing circuit subsequent to the connection oi. the main controller in the main line-switch circuit through its first operative position, and a contact device being located between said rotatable portions to continue the. lineswitch-closing circuit during such mechani cal interlocking.

1'7. Control apparatus con'lprising a mint able control member and a plurality oi relatively rotatable members respectively adapted for manual operation and for attacluncnt to said control member, said relatively rotatable members being adapted to interlock in either direction after equal dcgrces of movement.

1.8. Control apparatus comprising a plurality oil rotatable members having interlacing tongues and respectively adapted for manual operation and. for effecting the arrangement of circuits, the permissible forwardand backward relative movement being the same, and a contact member actuated by one of said rotatable members for respectively making contact and return to an inoperative position when said rotatable members engage in the one and the other direction.

19. Control apparatus comprising a rotatable control member and a plurality of relatively rotatable members respectively adapted for manual operation and for attaclmient to said control member, said relatively rotatable members being adapted to interlock in either direction after equal degrees of movement, and a contact device located between said rotatable members for respectively making contact and returning to the same inoperative position when said rotatable members interlock in one and the other direction.

20. Control apparatus comprising a plurality of rotatable members having interlacing tongues and respectively adapted for manual operation and for effecting the arrangement of circuits, and means for temporarily locking said members in an engaging position.

21. Control apparatus comprising a plurality of rotatable members having inter lacing tongiiies and respectively adapted for manual operation and for effecting the arrangement of circuits, and a spring-pressed pin in one member adapted to enter a recess in the other member when the tongues meet in a certain direction.

22. Control apparatus comprising a plurality of rotatable. members having interlacing tongues and respectively adapted for manual operation and for etfecting the ar-' interlock in either direction, and means for yieldingly restraining); "further relative moven'ient of said rotatable members when interlockii'ig in the one direction.

Control apparatus conn'n'ising a rotatable control member and a plurality of relatively rotatable members respectively adapted for manual operation and for attachment to said control men'iber, said relatively rotatable members being adapted to interlock in either direction after equal. degrees oi? movement, and a springprcssed pinin one member adapted to enter a recess in the other member under interlocking conditions in the one direction.

25. Control apparatus comprising a plurality of alined rotatable members, a contact device adapted to effect connection between the confronting end surfaces of said members, and means biased to temporarily lock said members in the contact-engaging position.

26. Control apparatus comprising two separately mounted rotatable members, said members embodying means for mutually interi'ering after equal forward and backward relative movement, one of said members having a different degree of initial movement from the other.

27. Control apparatus comprising a plurality of relatively rotatable mechanically interlocking members, the free movement of one member in each direction being the same, and the initial combined movement of said members being greater than said free movement.

28. Control apparatus comprisin a plurality of relatively rotatable mechani-ally interlocking members the free movement ot one member in either direction being less than the initial combined movement of said lllCll'llJQlS, said free movement in one directiOn being adapted to close a gap in a circuit and the completion of said combined movement being adapted to complete said circuit, whereby such free movement in the other direction will open said gap while the other member remains stationary.

29. Control apparatus comprising a plurality ol' rotatable members having interlacing tongues to permit equal free movement of the lirst member in each direction, the initial combined control step of said members being greater than such free movement. the forward free movement of said first member being adapted to close'a gap in a motor-controlling circuit and the completion of said combined movement being adapted to complete said circuit, whereby such free movement in opposite directions will open and close said gap while the second member remains stationary to effectinchiug of the motor being controlled.

80. In a controller, in con'ibimvtion, a plurality of contact lingers, arotatable drum for engaging the contact lingers, said drum having a plurality of contacting positions, a handle for operating the drum, said handle being disposed for movement relative to the drum and eircuit-controlling mechanism comprising a switch disposed for operation when the handle is moved relative to the drum, and means actuated upon the movement of the drum to a predetermined contacting position to cooperate with the switch to eii'ect the control of a circuit through the oscillation of the handle relative to the drum.

31. In a controller, adapted for connection to a source of power through a line switch provided with an independent actuating circuit, in combination, a plurality of contact fingers, a rotatable drum for engaging the contact lingers when set in different positions, a handle for operating the drum said handle being disposed for movement through a predetermined angle relative to the drum a switch disposed for actuation through the oscillation of the handle relative to the drum said switch being connected in the line-switch-actuating circuit, and means aetuated by the drum adapted to cooperate with said switch to close the line-swit eh-actuating circuit when the drum set in a predetermined contacting position whereby the unrestricted operation of the line switch may be efiected through the oscillation of the handle relative to the drum.

In a controller adapted to be conted to a source of power supply through a line switch in combination, a rotatably mounted drum, contact members for engaging the drum wnen set in a predetermil'ied position, a handle for actuating the drum, said handle being disposed for movement relative to the drum, an auxiliary switch disposed tor operation by the handle it moves reiative to the drum, and means mounted for actuation as the drum moves, said means being adapted to cooperate with the auxiliar switch only when the drum is in its initial contacting position to effect the operation of the line switch.

In testimony whereof we have hereunto subscribed our names this lath day of May, 1920.

LYNN G. RlLE Y.

HARRY R. MEYER. HOlVARD l'l. JOHN PTON JAN M. VAN NIEUKERKENH 

